Yes, his job is EXACTLY what you think it is.

The First Order Executioner Troopers are tasked with dispensing "final justice" to any Stormtrooper or vetted First Order loyalist guilty of traitorous acts. 

We're also quite sure he distributes "final justice" by way of extended electrified claw-thing.

Our Star Wars Last Jedi First Order Executioner Pop Bobble Head celebrates this new Stormtrooper designation with a compact, collectible caricature sporting highly detailed armor accents.

Based on his appearance in the latest Star Wars episode, The Last Jedi, this collectible, soft-vinyl figure from FUNKO presents a very stern First Order trooper with a very specific task implemented via electrified traitor-strangler.